CD34 and fibrosis: HSCs attraction to the lungs with fibrosis is preceded by a consecutive increase of the quantity of Lin-Sca-1+c-Kit+CD34- -cells, Lin-Sca-1+c-Kit+CD34+-cells, Lin-Sca-1+c-kit+-cells (1st day) (S2 Table) and neutrophil leucocytes in bone marrow (3rd day) (S3 Table).